IT201800003876A1 - Cosmetic treatment for improving the aesthetic appearance and physical-mechanical characteristics of keratins through the use of organic polyetheramine binding substances. - Google Patents

Description

Title: Cosmetic treatment for improving the aesthetic appearance and physical-mechanical characteristics of keratins through the use of organic polyetheramine binding substances.

Description

Field of the invention

The present invention relates to the treatment of keratins, and in particular of the keratins present in the hair of the human species and hair of the animal kingdom. The invention, in particular, concerns a method for improving the aesthetic appearance and physical-mechanical characteristics of keratins through the application on them of organic polymeric binding substances with two primary amino functional groups.

Background of the invention

At the state of the art it is known that keratins represent a group of proteins with a filamentous appearance and, generally, with a high sulfur content that are created by living cells as an expression of their own genetic code (DNA). These proteins form filamentous macro-aggregates such as hair, nails and surface layers of the skin. Keratins are classified as alpha-, beta, and amorphous types.

The structure of the keratins, their aesthetic, chemical-physical and mechanical characteristics and the techniques for modifying their structure to improve their appearance and cosmetic performance are known in the art from the documents:

- Boga C. et al. Curly or smooth? Old and new answers - Household and Personal Care Today: Hair care monographic supplement Vol.

10 (2) - March / April 2015;

- Istrate D.V .: Thesis on Heat Induced denaturation of fibrous hard α-keratins and their reaction with various chemical reagents, 2011; - Quadflieg J.M .: Thesis on Fundamental properties of afro-american hair as related to their straightening / relaxing behavior, 2003;

- Robbins C.R .: Chemical and Physical Behavior of Human Hair, 2012;

- Tate M.L. et al .: Quantification and prevention of hair damage J.

Soc. Cosmet. Chem., 1993, 44, 347-3 71 TRI / Princeton, Princeton, NJ-USA;

- Wang B .: Keratin: Structure, mechanical properties, occurrence in biological organisms and efforts at bioinspiration, Progress in Materials Science, Elsevier Ltd. - 2016 76 229-318.

From these documents it is inferred that in natural keratins the concentration of amino acids with residual acid functional group (Aspartic Acid and Glutamic Acid) or basic (Lysine, Histidine and Arginine) is similar, and in some cases higher, to the content in Cysteine and / or Cystine.

In keratins that have undergone treatments of discoloration, permanent waving, coloring, smoothing or chemical relaxation (bleaching, waving dyeing, straightening or relaxing), the concentration of cysteic acid can be similar or even higher than the concentration of Cysteine.

Conversely, in the keratins subjected to the aforementioned treatments, the concentration of thiol groups (R-SH) is completely negligible (0.01-0.1% of total amino acids) except in the permanent waving, where only in the phase of reduction with thioglycolates, or other similar substances with suitable redox potential, high concentrations of thiol groups are formed.

These, however, in the subsequent phase of the treatment, are reoxidized to disulfide bridges by oxidants such as hydrogen peroxide, sodium bromate or the like.

As an example of the state of the art aimed at the transient conditioning of keratins and their fibers, documents WO2016100634A2 and WO2016074986A1 can be cited. WO2016100634 A2 discloses a hair conditioning composition comprising one or more materials useful for improving the properties of the hair fibers. In particular, the composition underlying the treatment proposed by document WO2016100634 A2 is aimed at the reintegration of natural lipids that play an important role in the hair structure, keeping together the proteins that are an integral part of the cuticular membrane / hair cortex.

Document WO2016074986 A1 discloses a composition to be used as a shampoo or hair conditioner capable of improving the manageability of the hair. In particular, the proposed composition provides for the combined use of hydrophilic solubilizing substances, cationic polymers and surfactants, avoiding the use of hydrophobic substances such as natural / synthetic oils and / or silicones. The permanent modification of the keratin structure has been carried out since 1938 by applying the procedure discovered by Arnold F. Willatt which uses reducing substances containing thiol functional groups and basic environment (eg ammonium tiglycolate). The same technique is still widely used for the permanent modification of the structure of the keratins as known in the document US2631965A.

Conversely, the primary amino groups present in keratins (deriving from the amino acids Arginine, Lysine and Histidine) have been, and still are, used for straightening curly hair by applying substances containing aldehyde groups (e.g. formic, acetic, glutaric aldehyde etc. .) as known in documents US3665072A and US9844500 B2.

It is in fact known to those skilled in the art that formaldehyde, as well as other aldehydes, react at temperatures above 100 ° C with the amino groups (R-NH2) of the keratins, forming the so-called "methylene" bridges (R-NH-CH2 -NH-R) as known in the documents (US2006104928A1 and WO2011104282A2).

Disclosure of the Invention

The purpose of the present invention is to provide a method for the treatment of keratins capable of:

- protect the structure of the keratin fiber during aggressive cosmetic treatments (ed. coloring, perm, bleaching, smoothing, relaxation, etc.);

- repair and / or improve the structure of the keratins damaged by previous cosmetic treatments;

- improve the appearance and physical-mechanical characteristics of keratins degraded by exposure to environmental stress (e.g. UV rays, oxidizing atmospheric agents such as ozone, photochemical smog etc.).

These and other objects are achieved with the present invention which relates to a method for the treatment of keratins with organic polymeric binding substances having two primary amino functional groups.

Detailed description of the invention

According to a preferred - but not limiting - embodiment, the present invention relates to a method for the treatment of keratins with polymeric organic binding substances having two primary amino functional groups.

The invention consists in having discovered the possibility of using, in cosmetically acceptable conditions, a family of organic binding substances to modify and improve the aesthetic appearance and the chemical-physical properties of keratins.

The researches performed have surprisingly shown that the treatment of keratin fibers with polymeric organic binding substances, containing two primary amino functional groups, can induce significant improvements in their aesthetic appearance on the keratins themselves, especially those degraded by aggressive cosmetic treatments or environmental stress. and their physical-mechanical characteristics.

The organic binding substances that have been shown to possess these characteristics have the typical chemical structure of the family of polymers known as POLYETHERAMINE (or polyetherdiamine), identified by CAS number 9046-10-0.

Organic substances, belonging to this family of polymers, are widely used in the production of epoxy resins. Examples of polyetheramine molecules, used for these applications, are reported in documents WO2011 / 012560 (PCT / EP2010 / 0609764), WO2014 / 070451 (PCT / US2013 / 065175) and WO2011 / 024014A1.

It is known that many chemical industries produce polyetheramine substances and that trademarks have been registered to identify the commercial product and protect the manufacturer. Representative examples are the following polyetheramines: ELASTAMINE® HE-1000, HE-1700, HE-1000, JEFFAMINE® D-230, D-400, D-2000, M-1000, ED-600, ED-900, ED-2003 (Huntsman Co.), BAXXODUR® EC-301, EC-302, EC-303 (BASF SE).

Figures I - II - III - IV show the chemical structures that characterize the organic substances belonging to the POLYETHERAMINE family.

Fig. I: Polyetheramine composed of OXYETHYLENE units (oxyethylene) (C2)

POLYETHERAMINES (C2 or oxyethylene units) x = 1 to 50

Fig. II: Polyetheramine composed of OXYPROPYLENE units (oxypropylene) (C3)

POLYETHERAMINES (C3 or oxypropylene units) y = 1 to 50

Fig. III: Polyetheramine composed of mixtures of OXYETHYLENE (oxyethylene) (C2) and OXYPROPYLENE (oxypropylene) (C3) units.

POLYETHERAMINES (mixture of oxyethylene and oxypropylene units x = 0 to 50, y = 0 to 50, z = 0 to 50

Fig. IV: Polyetheramine composed of TETRAHIDROFURANIC units (tetrahhydrofuranic)

(C4).

POLYETHERAMINES (C4 or tetrahydrofuranic units) m = 1 to 50

These organic binding substances put in contact, in cosmetically acceptable conditions, with keratin fibers (hair or animal hair) degraded in their aesthetic and physical-mechanical characteristics, or characterized by poor luster, frizz, high porosity, poor tensile strength, they are surprisingly capable of producing significant improvements in the aesthetic and physical-mechanical characteristics of keratins that can be easily appreciated by a person skilled in the art.

These remain active and perceptible even after subsequent washing of the fibers themselves.

The POLYETHERAMINE organic binding substances, with two primary amino groups, according to the structures represented in the Formulas of figures I - II - III - IV and subject of this patent application, are used dissolved or dispersed in a "cosmetically acceptable medium" (meaning with said term a mixture of substances commonly used in the manufacture of cosmetic products) at a concentration between 0.1% and 99.9% by weight / weight.

The substances commonly used in the manufacture of cosmetic products are to be understood as those listed in the International Cosmetic Ingredient Dictionary and Handbook Sixteenth Edition 2016 5 volumes, published periodically by the American body "Personal Care Products Council" 1620 L Street, NW Washington, D.C. These are classified into categories including, but not limited to, the following: abrasive, absorbent, anti-caking agent, anti-corrosion, anti-dandruff, anti-foam, anti-microbial, anti-oxidant, anti-perspirant, anti-plaque, anti-seborrheic, anti-static, astringent, binder, whitening, buffering, swelling, chelating agent , cosmetic dye, denaturing, deodorant, depilatory, detangling, emollient, emulsifier, emulsion stabilizer, film forming, flavoring, foaming, gelling, hair conditioning, hair dye, hair conditioning, hair dye, hair fixative, waving o hair smoothing, humectant, hydrotropic, keratolytic, masking, moisturizing, nail conditioning, mattifying, oxidizing, pearlescent, perfuming, plasticizing, preservative, propellant, reducing, re-greasing, refreshing, skin conditioning, skin protection, soluble smoothing, soothing stabilizer, surfactant vat, tanning agent, tonic, UV absorber, UV filter, viscosity control substances.

APPLICATION EXAMPLES:

Following the surprising effects found in the research and development phase of the application technique of the organic binding substances object of the present patent application, the application tests to keratins of the human species (hair) described in the following examples have been set up.

Example 1: Comparison between traditional permanent and permanent performed using the binding organic substance Polyetheramine D2000 (CAS no. 9046-10-0).

Hair samples were obtained from a human subject and cut into two strands of about 1 cm in width weighing about 5 grams.

Commercial kit for perm: the kit used, produced by Cosmec srl Milan (Italy), contained in phase 1 the reducing substances based on ammonium thioglycolates dispersed in a "cosmetically acceptable medium" and, as an oxidizing agent (phase 2), hydrogen peroxide also dispersed in a "cosmetically acceptable medium".

Organic binding substance used: Polyetheramine D2000 (CAS no. 9046-10-0) also known as Baxxodur <®> EC303 (BASF SE), dissolved in a "cosmetically acceptable medium".

The cosmetically acceptable medium containing the binder organic substance together with other substances commonly used in cosmetics is defined as a "binding mixture".

The "binder mixture" used had the composition indicated in Table (I) below.

TABLE (I)

Ingredient% by weight Water Quite sufficient to 100% Glycolic acid 1,0 Malic acid 1,5 Baxxodur <®> EC303 6,0 Wisteria 1,0 Polyquaternium-10 0,3 Xanthan gum 0,8 Sodium dehydroacetate 0,4 Parallel is A second "cosmetically acceptable medium" was prepared containing all the ingredients listed in Table (I) except the organic polyetheramine binding substance Baxxodur <®> EC303.

The strands of hair were washed with shampoo, dried with a towel and then rolled around a permanent curler (a tool well known to people skilled in the art). Phase 1 of the commercial kit was applied to the two hair strands and left in contact for 20 minutes.

The hair was then rinsed with warm water and then dried with a towel.

Method using the organic binding substance

The “binding mixture” of Table (I) was applied to the first strand of hair by mixing 20 grams of the binding mixture and 30 grams of phase 2. The resulting mixture was left in contact with the hair for a time of 15 minutes.

The lock of hair was then rinsed with warm water for about 1-2 minutes, then unrolled from the curler.

The lock was subjected to dehydration by heating with a special curling iron (known to experts in the sector) at a temperature of 150 ° C.

The lock was washed with Keratin plus shampoo from the Treasure Jean Paul Mynè ® line.

The washing and drying steps were repeated 10 times.

Method without using the organic binding substance

A second portion of hair was treated in the same way as already described for the first lock of hair using the mixture of Table (I) without the organic polyetheramine binding substance Baxxodur <®> EC303.

Results

Both perms showed a good hold of the perms induced by the perms after the first wash and conditioning. After 10 washing and drying cycles with the same shampoo and conditioner, a marked reduction of the curl was observed compared to the situation obtained after the first shampoo and conditioner.

However, the appearance and consistency of the permanent obtained using the "binder mixture" of Table (I), containing the organic polyetheramine binding substance Baxxodur <®> EC303, showed greater shine and better manageability than the permanent obtained using the free mixture. of the organic polyetheramine binding substance Baxxodur <®> EC303.

The strand treated with the "binding mixture" of Table (I) showed a significant improvement in tensile strength compared to the strand treated with the blend without the organic polyetheramine binding substance Baxxodur <®> EC303.

Example 2: Checking the shine and texture of the hair after treatment with a "binding mixture" containing the organic polyetheramine substance PolyTHF amine <®> 1700 (CAS no. 960525-56-8).

Two strands of natural (untreated) black hair were obtained from a Caucasian human.

Organic binding substance used: PolyTHF amine <®> 1700 (CAS no. 960525-56-8) dissolved in a "cosmetically acceptable medium". The cosmetically acceptable medium containing the binder organic substance together with other substances commonly used in cosmetics is defined as a "binding mixture".

The "binder mixture" used had the composition indicated in Table (II) below.

TABLE (II)

Ingredient% by weight Water quantum satis 100% Lactic acid 2,0 Succinic acid 4,0 PolyTHF amine <®> 1700 8,0 Proline 1,0 Ethylenediaminetetraacetic acid 0,5

N-Hydroxysuccinimide 0.5 In parallel, a second “cosmetically acceptable medium” was prepared containing all the ingredients listed in Table (II) except the polyetheramine binding organic substance PolyTHF amine® 1700.

Both mixtures were mixed in a 1: 3 ratio with a conditioner (Jean Paul Mynè® Ocrys Bandha Conditioner) to form a homogeneous creamy paste.

Methods

The two strands of hair were washed with Jean Paul Mynè® Ocrys Bandha shampoo and then dried with a towel.

The hair was then combed with a wide-toothed comb followed by combing with a fine-toothed comb for 2 minutes.

After combing, the creamy paste containing the binding mixture of Table (II) was applied manually, using a brush, to the lock of hair and then combed for about 1 minute. The hair sample was left in contact with the creamy paste containing the polyetheramine binding organic substance PolyTHF amine <®> 1700 for a period of about 15 minutes and then rinsed with water, and washed with Jean Paul Mynè® Ocrys Bandha shampoo and conditioner. Shampoo and Conditioner.

The same hair sample was washed and conditioned an additional five times with the same shampoo and conditioner.

A second lock of hair (the control) was subjected to the same treatment described above, but using the second creamy paste containing all the ingredients listed in Table (II) except the organic polyetheramine binding substance PolyTHF amine <®> 1700.

Both locks were subjected to dehydration by heating with a special flat iron (known to experts in the field) at a temperature of 180 ° C.

Results

The hair sample treated with the "binder mixture" containing the organic polyetheramine binding substance PolyTHF amine <®> 1700 was softer to the touch than the sample treated with the creamy paste without the organic polyetheramine binding substance PolyTHF amine <®> 1700.

The strand treated with the "binding mixture" of Table (II) showed a significant increase in tensile strength and gloss compared to the strand treated with the creamy paste without the organic polyetheramine binding substance PolyTHF amine <®> 1700.

The hair sample treated with the "binding mixture" of Table (II) was aesthetically more "beautiful" than the other. The higher shine and better texture remained after five shampoo and conditioner treatments.

Example 3: Check the shine and texture of bleached hair after treatment with a "binding mixture" containing the organic polyetheramine substance Baxxodur® EC 302 (CAS no.

9046-10-0)

A sample of blond hair described as highly porous, frizzy and difficult to style was obtained from a Caucasian human. The hair sample was divided into two strands weighing approximately 3 grams each.

Organic binding substance used: Baxxodur® EC 302 (CAS No.

9046-10-0) dissolved in a "cosmetically acceptable medium". The cosmetically acceptable medium containing the binder organic substance together with other substances commonly used in cosmetics is defined as a "binding mixture".

The "binder mixture" used had the composition indicated in Table (III) below.

TABLE (III)

Ingredient% by weight Water Quite sufficient to 100% Nicotinamide 3.0 Succinic acid 3.0 Baxxodur® EC 302 8.0 Valine 1.0 Phenoxyethanol 0.75 Ethylhexylglycerin 0.25 In parallel a second "cosmetically acceptable medium" was prepared containing all ingredients listed in Table (III) except the organic polyetheramine binding substance Baxxodur® EC 302.

The two blends were mixed with Jean Paul Mynè ® Ashana Conditioner in a 1: 2 ratio until a homogeneous creamy paste was obtained.

Methods

Both locks of blond hair were washed with Jean Paul Mynè ® Ashana shampoo and then dried with a towel. The hair was then combed with a wide-toothed comb, followed by combing with a fine-toothed comb for 5 minutes.

About 5 grams of the creamy paste containing the organic polyetheramine binding substance Baxxodur® EC 302 was manually applied to one of the two strands with a brush. The strand was then combed for about 2 minutes.

The hair sample was left in contact with the “binding mixture” of Table (III) for about 10 minutes. Then the hair was again treated with about 5 grams of the "binding mixture" of Table (III).

The hair sample was combed for about 10 seconds and left undisturbed for another 5 minutes.

The hair sample was then rinsed with water and then washed with Jean Paul Mynè ® Ashana shampoo and conditioner, and dried with a hairdryer.

After the initial examination, the sample was washed and conditioned two more times with the same shampoo and conditioner.

A second lock of blond hair was subjected to the same treatment described above, but using the second creamy paste containing all the ingredients listed in Table (III) except the organic polyetheramine binding substance Baxxodur® EC 302.

The two locks, after drying with a hairdryer, were both subjected to dehydration by heating with a special flat iron (known to experts in the field) at a temperature of 180 ° C.

Results

The hair sample treated with the "binder mixture" containing the organic polyetheramine binding substance Baxxodur® EC 302 was softer to the touch than the sample treated with the creamy paste without the organic polyetheramine binding substance Baxxodur® EC 302.

The strand treated with the “binding mixture” of Table (III) showed a significant increase in tensile strength and gloss compared to the strand treated with the creamy paste without the organic polyetheramine binding substance Baxxodur® EC 302.

The hair sample treated with the "binder mixture" of Table (III) was aesthetically more "beautiful" than the other. The higher shine, and the better consistency, remained so after two treatments with shampoo and conditioner.

Example 4: Check color retention and texture of colored hair treated with a "binding mixture" containing the organic polyetheramine substance Polyetheramine D230 (CAS no. 9046-10-0).

Three strands of hair weighing about 5 grams were obtained from a Caucasian human.

Dye formulation: commercial permanent hair coloring kit consisting of: Jean Paul Mynè® DOC COLOR permanent color (grade # 4) Jean Paul Mynè ® DOC ENZYME 0.3 bleaching (hydrogen peroxide 30 volumes).

Organic binding substance: Polyetheramine D230 also known under the brand name Baxxodur <®> EC 301 (CAS No 9046-10-0) dissolved in a cosmetically acceptable medium The cosmetically acceptable medium containing the organic binding substance together with other commonly used substances in cosmetic, it is defined as a "binding mixture". The "binder mixture" used had the composition indicated in Table (IV) below.

TABLE (IV)

Ingredient% by weight Water Quite sufficient to 100% Chitosan 1,0 Citric acid 2,5 Baxxodur <®> EC 301 10,0 Valine 0,5 Trisodium ethylenediamine disuccinate 0,5 Panthenol 1,0 Propylene glycol 5,0 Parallel it was prepared a second "cosmetically acceptable medium" containing all the ingredients listed in Table (IV) except the organic polyetheramine binding substance Baxxodur <®> EC 301.

Two portions of cosmetic coloring paste were then prepared consisting of 50 grams of Jean Paul Myne'® coloring kit 10 grams of the "binder mixture" of Table (IV) and a third portion of cosmetic coloring paste consisting of 50 grams of Jean coloring kit Paul Myne'® 10 grams of the “cosmetically acceptable medium” containing all the ingredients listed in Table (IV) except the organic polyetheramine binding substance Baxxodur <®> EC 301.

Methods

The hair strands were washed with a Jean Paul Myne® Treasure Enhancing shampoo then dried with a towel. Subsequently, the cosmetic coloring paste free of the organic polyetheramine binding substance Baxxodur <®> EC 301 was applied to a lock of hair, massaging with the fingers to promote absorption on the keratin fibers and leaving in contact for 15 minutes.

The cosmetic coloring paste containing the organic polyetheramine binding substance (Baxxodur <®> EC 301) was applied in the same way on the two remaining hair strands, massaging with the fingers to promote absorption on the keratin fibers.

One lock was left in contact with the cosmetic paste for 5 minutes while the other was left in contact with the cosmetic paste for 15 minutes.

After the established contact time, the three strands of hair were then rinsed with warm water and washed with Jean Paul Mynè® Treasure Enhancing Shampoo and Conditioner five times before examining the results.

Results

The two strands of hair treated with the "binding mixture" of Table (IV) showed better color retention, greater brilliance and less frizz compared to the strand treated with the creamy paste without the organic polyetheramine binding substance Baxxodur <® > EC 301.

The locks treated with the "binding mixture" of Table (IV) showed an overall more "beautiful" appearance to the control.

The strand of hair in contact with the “binding mixture” of Table (IV) for 15 minutes showed a significant increase in shine compared to the strand in contact for 5 minutes.

Overall, the strands treated with the "binding mixture" containing the organic polyetheramine binding substance Baxxodur <®> EC 301, showed a significant increase in gloss and tensile strength compared to the strands treated with the cosmetic blend without the organic polyetheramine binding substance. Baxxodur <®> EC 301.

Example 5: Comparison between hair treated with a bleaching cosmetic product applied simultaneously to the "binder mixture" containing the organic polyetheramine substance PolyTHF amine® 1700 (CAS no. 960525-56-8) and hair treated with only the bleaching cosmetic product.

Organic binding substance used: PolyTHF amine® 1700 (CAS no. 960525-56-8) dissolved in a "cosmetically acceptable medium". The cosmetically acceptable medium containing the binder organic substance together with other substances commonly used in cosmetics is called a "binding mixture".

The "binder mixture" used had the composition indicated in Table (V) below.

TABLE (V)

Ingredient% by weight Water quantum satis 100% Succinic acid 2.0 Malic acid 3.0 PolyTHF amine <®> 1700 5.0 Proline 1.0 Ethylenediaminetetraacetic acid 0.5

N-Hydroxysuccinimide 0.5 The commercial product Jean Paul Mynè ® was used as a bleaching kit, consisting of the following products: DOC OLEODEC DOC ENZYME 0.3.

To two 30-gram aliquots of the bleaching kit were added respectively 10 grams of the "binding mixture" of Table (V) and 10 grams of a "cosmetically acceptable medium" containing all the ingredients listed in Table (V) except the organic binding substance polyetheramine PolyTHF amine® 1700.

Each aliquot was mixed and homogenized until a homogeneous creamy paste was obtained.

For the test we used two strands of human hair weighing 3 grams and a length of about 20 cm each, taken from the same Caucasian subject.

The medium brown hair had previously been colored with an unknown professional hair color and appeared frizzy, difficult to comb and with high porosity.

The first strand was bleached with the creamy paste containing the polyetheramine binder organic substance PolyTHF amine® 1700, applying it with an applicator brush on the hair resting on an aluminum foil. The aluminum foil was then wrapped around the lock, leaving it in contact with the creamy paste for 30 minutes. The lock was then washed with Jean Paul Mynè ® OCRYS Bandha shampoo and rinsed with warm water for 2 minutes.

The second strand was bleached with the aliquot of bleaching paste free of the polyetheramine binding organic substance PolyTHF amine® 1700.

Also in this case, the bleaching paste was applied with an applicator brush on the hair resting on an aluminum foil. The aluminum foil was then wrapped around the lock, leaving it in contact with the creamy paste for 30 minutes. Each lock was then washed with Jean Paul Mynè ® Ocrys Bandha shampoo and rinsed with warm water for 2 minutes. Results

A notable difference was observed between the quality of the hair of the strand treated with the "binding mixture" of Table (V) and that of the strand treated with the cosmetic paste free of the organic polyetheramine binding substance PolyTHF amine® 1700.

The strand treated with the binding mixture of Table (V) was softer to the touch, less frizzy, brighter and shinier, offering the marked sensation of greater hydration than the other. Both samples were washed and conditioned 5 more times with the same shampoo and conditioner.

After five washes, the benefits obtained on the strand treated with the "binding mixture" containing the polyetheramine binding organic substance PolyTHF amine® 1700 were even more evident than the other.

The strand treated with the bleaching kit added with the “binding mixture” of Table (V) showed a significant increase in tensile strength and gloss compared to the strand treated with the commercial bleaching kit without the polyetheramine organic binding substance PolyTHF amine® 1700.

Unless otherwise defined, all the technical and scientific terms used herein have the same meanings commonly understood by an expert in the field to which the described invention belongs (cosmetic art). The publications and patent documents cited herein are specifically incorporated by reference. Those skilled in the art will recognize, or will be able to recognize using their normal cosmetic product application technique, many situations equivalent to the specific embodiments of the invention described in the above examples (non-exhaustive examples).

Such equivalent applications are intended to be included in the attached claims.

The materials and dimensions of the invention as described above and claimed hereinafter, may be any according to requirements. Furthermore, all the details can be replaced with other technically equivalent ones, without thereby departing from the protective scope of the present patent application.

Claims (1)

CLAIMS 1. Method for improving the aesthetic appearance and physical-mechanical characteristics of keratins, characterized by the application on the keratins of at least one substance belonging to the polyetheramine family, containing two primary amino functional groups and having a chemical structure corresponding to Figures I - II - III - IV: - Fig. I: Polyetheramine composed of OXYETHYLENE units (oxyethylene) POLYETHERAMINES (C2 or oxyethylene units) x = 1 to 50 - Fig. II: Polyetheramine composed of OXYPROPYLENE units (oxypropylene) POLYETHERAMINES (C3 or oxypropylene units) y = 1 to 50 - Fig. III: Polyetheramine composed of mixtures of OXYETHYLENE (oxyethylene) (C2) and OXYPROPYLENE (oxypropylene) (C3) units. POLYETHERAMINES (mixture of oxyethylene and oxypropylene units x = 0 to 50, y = 0 to 50, z = 0 to 50 - Fig. IV: Polyetheramine composed of TETRAHIDROFURANIC (tetrahhydrofuranic) units (C4). POLYETHERAMINES (C4 or tetrahydrofuranic units) m = 1 to 50 2. Method for the treatment of keratins according to claim 1, characterized by the application on keratins of Polyetheramine D2000, also known as Baxxodur® EC 303 (CAS number 9046-10 -0) in a concentration between 0.1% and 99.9%. 3. Method for the treatment of keratins according to claim 1, characterized by the application on the keratins of Polyetheramine D400 (CAS n. 9046-10-0), also known as Baxxodur <®> EC302 in a concentration between 0.1% and 99.9%. 4. Method for the treatment of keratins according to claim 1, characterized by the application on the keratins of Baxxodur <®> EC 301 (CAS number 9046-10-0) in a concentration between 0.1% and 99, 9%. 5. Method for the treatment of keratins according to claim 1, characterized by the application on the keratins of PolyTHF amine <®> 1700 (CAS number 960525-56-8) in a concentration between 0.1% and 99, 9%. 6. Method for the treatment of keratins according to claim 1, characterized by the application on the keratins of at least one substance according to claims 1, 2, 3, 4 and 5 dissolved or dispersed in a cosmetically acceptable medium. 7. Method for the treatment of keratins according to claims 1, 2, 3, 4 and 5 characterized in that the organic binding substances are dissolved in a cosmetically acceptable medium at a concentration between 0.1% and 99.9 % (weight / weight). 8. Method for the treatment of keratins according to claims 1, 2, 3, 4, 5 and 6 characterized in that the organic binding substances are used according to the process consisting of the following steps: 8.a: application on the keratins of one of the cosmetically acceptable solutions containing the organic polyetheramine binding substances according to claims 1, 2, 3, 4, 5 and 6; 8.b: maintaining the cosmetically acceptable solutions, containing the organic polyetheramine binding substances according to claims 1, 2, 3, 4, 5 and 6 in contact with the keratins for a period of time ranging from 1 minute to 60 minutes; 8.c: rinsing of the keratins with water; 8.d: drying of the keratins by using heating fans commonly used in the cosmetic art (hairdryer); 8.e: any exposure of the keratins to a heat source that allows them to be heated to temperatures between 50 and 250 ° C by using tools commonly used in the cosmetic art (curling irons or heating plates).